LOCAL SINGLET FOR CUO AND ND2CUO4

被引:30
作者
GUNNARSSON, O [1 ]
JEPSEN, O [1 ]
SHEN, ZX [1 ]
机构
[1] STANFORD UNIV,STANFORD ELECTR LABS,STANFORD,CA 94305
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 13期
关键词
D O I
10.1103/PhysRevB.42.8707
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Photoemission 3d spectra according to the Anderson impurity model and experiment are compared for CuO and Nd2CuO4. While good agreement between theory and experiment is obtained for CuO, the calculated local singlet has much more weight than observed for Nd2CuO4. This suggests an appreciable difference between the low-energy excitations in CuO and Nd2CuO4, which is surprising due to the similarities of the compounds, both having formally divalent Cu coordinated to four oxygen atoms in an approximate square. This difference is not predicted by the impurity Anderson model. © 1990 The American Physical Society.
引用
收藏
页码:8707 / 8709
页数:3
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